duckwizard Posted December 29, 2004 Report Share Posted December 29, 2004 I have a top mount distributor T20 motor 1955. Are the differences with the side points type motor before I start machining on my motor for PVL etc. Is there any benefit to the later side points motor. Would be interested to hear your comments on this. Quote Link to comment Share on other sites More sharing options...
subira Posted January 3, 2005 Report Share Posted January 3, 2005 There's a good number of differences. The major issue is with the bearings, up to engine no. 84268 the mains are a plain bush, the later engines have 6304 ball races, which are longer lasting. There's been lots of changes to the big end as well, started with rollers, then to a plain bush and then back to rollers, you can get a conversion as the big end is a very weak part on a Cub. I phoned around a few of the experts before buying anything and they all advised getting the latest engine I could find mainly due to the bearings and oil pump. I ended up with a 65 Mountain Cub motor that has been through a total rebuild, including PVL, Roller Big end, sprocket access, etc etc. I was speaking to someone before xmas who had a set of cases that had been modified for PVL and the sprocket access done, he was looking to sell them as he'd just got hold of a brand new set of cases. I see if he still has them and let you know. All is not lost though as many of the parts are interchangeable, if you were to find some later cases. Quote Link to comment Share on other sites More sharing options...
duckwizard Posted January 4, 2005 Author Report Share Posted January 4, 2005 Subira, That would be great. Save me machining costs as well. Quote Link to comment Share on other sites More sharing options...
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